Lumbarization of sacrum is a common variation. In fact, the appendix of sacrum 1 vertebral body does not form a joint with the auricular surface of ilium, and the shape of sacral vertebral body is biased towards lumbar vertebrae. There will be no symptoms of this mutation, and there is no problem of treatment. Other spinal variations include: vertebral block, spina bifida occulta, lumbosacral sacralization, etc.